JP2013520365A - Floating LNG filling station - Google Patents

Abstract

An object of the present invention is to provide a floating LNG filling station so as to be able to fill LNG to be used as fuel for ships and offshore structures at sea.
A floating LNG filling station is used to float on the sea and fill a ship or offshore structure with LNG. The floating LNG filling station includes a floating structure, an LNG tank provided to store LNG in the floating structure, and an LNG for discharging LNG from the LNG tank to the ship or offshore structure. And a LNG pump installed to provide the LNG line with a pumping force for discharging LNG.
[Selection] Figure 2

Description

  The present invention relates to a floating LNG filling station capable of filling a ship or offshore structure with LNG used as fuel at sea.

  In general, natural gas is transported in a gas state via gas piping on land or sea, or stored in an LNG carrier in the form of liquefied natural gas (hereinafter referred to as “LNG”). And transported to long-distance customers. Such LNG is obtained by cooling natural gas to a cryogenic temperature of about −163 ° C., and its volume is reduced to about 1/600 that of natural gas in the gas state. Very suitable for long distance transportation through. Such an LNG transport ship has an LNG storage tank that can withstand extremely low temperatures in order to load the LNG and operate the sea to unload the LNG to land customers.

  The structure of a conventional LNG storage tank of an LNG transport ship will be described with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view showing a conventional LNG transport ship. As shown in FIG. 1, the conventional LNG transport ship 1 is provided with an LNG storage tank 2 on the inner side. The LNG storage tank 2 is made of a structure and a material for withstanding extremely low temperatures, Piping equipment and a pump (not shown) are installed for discharging.

  Such a conventional LNG transport ship 1 stores the LNG in the LNG storage tank 2 and transports the LNG to a desired land-based demand destination.

  On the other hand, in recent years, the number of ships that use LNG as a fuel has been gradually increasing as the prices of oils increase worldwide. However, the place where LNG necessary for such a ship can be filled is limited to a small number of land filling stations around the sea and adjacent ports, and it is impossible to fill fuel during operation. Therefore, it is subject to time and space restrictions that it must move to the port for LNG filling.

  Currently, no ship or floating structure has been developed to solve these restrictions. In the case of the conventional LNG transport ship 1, by having only a function for transporting LNG, it is impossible to expect a filling function of LNG at all, and even when LNG filling to a ship is necessary at sea, , Had a problem that could not solve this.

US Pat. No. 6,805,598

  Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a floating LNG filling station capable of filling LNG used as fuel into a ship or offshore structure at sea. There is.

  Another object of the present invention is to generate power and generate power using evaporative gas, which is generated when LNG is supplied to an object to be filled or when LNG is supplied from an LNG supply ship, as a fuel. The object is to provide a floating LNG filling station configured to supply the required power to (various power consuming devices of the floating LNG filling station).

  According to an embodiment of the present invention, a filling station that floats on the sea and fills a ship or offshore structure with LNG includes a floating structure and an LNG provided to store the LNG in the floating structure. A floating type including a tank, an LNG line for discharging LNG from the LNG tank to the ship or offshore structure, and an LNG pump installed to provide a pumping force for discharging LNG to the LNG line An LNG filling station is provided.

  Further, according to the embodiment of the present invention, LNG can be supplied by being compressed at any one of low pressure, medium pressure, and high pressure so as to correspond to the compression and filling conditions of the ship or offshore structure. And a multi-stage compressor installed in the LNG line.

  Further, according to the embodiment of the present invention, the LNG discharged from the LNG line is transferred so as to be supplied to the ship or offshore structure, and the evaporated gas generated from the tank of the ship or offshore structure is returned. It further includes a handling unit that can be processed.

  In addition, according to an embodiment of the present invention, the apparatus further includes a device that can use the evaporated gas generated during the transfer of the LNG as a fuel for temporary storage or power production.

  In addition, the floating structure includes one or more of an automatic position adjustment device or a self-tethering device by satellite navigation.

  The floating structure has a water treatment device for preventing shaking depending on the amount of LNG loaded or the state of the sea.

  Further, the cargo handling unit transfers not only the LNG cargo handling but also the LNG tank to be filled with LNG via the LNG line.

  The LNG line is provided with a first bypass line for bypassing the compressor.

  The LNG line is provided with a second bypass line so as to bypass the LNG pump and supply LNG to the LNG tank.

  The cargo handling unit further includes an evaporative gas line for unloading the evaporative gas.

  The cargo handling unit is located in the floating structure and uses an LNG as fuel, and a supply line branched from the evaporative gas line to supply evaporative gas to the evaporative gas processing device And.

  The cargo handling unit includes a metering unit that can detect the amount of LNG cargo handling or cargo handling.

  In addition, the equipment includes a separate evaporative gas processing line that receives supply of evaporative gas that is excessively produced from the LNG tank, a gas compressor that is coupled to the evaporative gas processing line and pressurizes the evaporative gas, and the gas Control that is connected to the rear stage of the compressor and is capable of temporarily storing the compressed evaporative gas, and is connected to an extension line that is connected from the rear stage of the storage container to the power production device to control the evaporative gas supply flow rate. Including valves.

  The equipment further includes a generator that generates electric power using the power generated from the power generation device, and a voltage control device coupled between an output end of the generator and a utility.

  According to an embodiment of the present invention, by allowing LNG to be used as a fuel for a ship or offshore structure at sea, it is possible to smoothly operate a ship or offshore structure using LNG as a fuel. In addition, since it is not necessary for the offshore structure to move to the port for filling with LNG as fuel, the time restriction due to movement and the space restriction due to berthing can be minimized.

  Further, according to the embodiment of the present invention, there is an advantage in that the excessively generated evaporated gas is processed and used as fuel, and this can be utilized for power production and power production to supply electric power necessary for various utilities. . Furthermore, the embodiment of the present invention has an advantage that the vapor gas generated in excess can be pressurized, temporarily stored in a compression container, and used again as fuel.

It is sectional drawing which shows the LNG transport ship by a prior art. 1 is a configuration diagram illustrating a floating LNG filling station according to a first embodiment of the present invention, in which a floating LNG filling station fills a filling target with LNG; FIG. FIG. 3 is a block diagram showing a modified embodiment of the floating LNG filling station shown in FIG. 2, in which a floating LNG filling station receives a supply of LNG from an LNG supply ship. It is a block diagram which shows the floating type LNG filling station by 2nd Embodiment of this invention. It is a block diagram which shows the process for processing the evaporating gas which generate | occur | produces when supplying LNG to a filling object from a floating type LNG filling station. It is a block diagram which shows the process for processing the evaporative gas which generate | occur | produces when receiving LNG from a LNG supply ship to a floating type LNG filling station.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, when it is determined that a specific description related to a known configuration or function may obscure the gist of the present invention, detailed description thereof is omitted. Moreover, the same or similar reference numerals in the drawings indicate the same components.

  FIG. 2 is a block diagram showing a floating LNG filling station according to the first embodiment of the present invention, and FIG. 3 is a block diagram showing a modified embodiment of the floating LNG filling station shown in FIG. In particular, FIG. 2 shows a method in which the floating LNG filling station of the present invention fills an object to be filled with LNG, and FIG. 3 shows a method in which the floating LNG filling station of the present invention receives supply of LNG from an LNG supply ship. Show.

  As shown in FIG. 2, the floating LNG filling station 100 according to the first embodiment is in a state of floating on the sea, such as a ship or an offshore structure that uses LNG as a fuel for propulsion or power generation. Used to fill the filling object 10 with LNG. The floating LNG filling station 100 includes a floating structure 110, an LNG tank 120 provided in the floating structure 110, an LNG line 130 for transferring LNG from the LNG tank 120 to the filling object 10, and an LNG line. LNG pump 140 and compressor 150 provided on 130, and a cargo handling unit 160 for supplying LNG transferred from LNG line 130 to object 10 such as a ship or offshore structure. The floating LNG filling station 100 may further include an evaporative gas processing facility capable of processing evaporative gas generated when the LNG is supplied, as described with reference to FIGS. 5 and 6.

  The floating structure 110 may be provided with a propulsion system having an appropriate capacity in order to prepare for a marine disaster caused by a storm. In contrast to this, the floating structure 110 has a form of a barge that moves with the aid of a tugboat, or uses the tugboat to bring the filling object 10 into contact with the floating structure 110. And can have various structures for floating on other seas.

  The floating structure 110 may have a self-mooring device 111 to be fixed at a position where the ship frequently travels in the ocean or at any other required position. Further, the floating structure 110 may also have a mooring function for precisely adjusting the position by using a dynamic positioning (DP) device 400, 410 capable of automatic position fixing through a propulsion device and satellite equipment or satellite navigation. it can. That is, the floating structure 110 may have one or more of the satellite navigation automatic position adjustment devices 400 and 410 or the self-tethering 111 device.

  In addition, the floating structure 110 can include a water treatment device 112 including a large number of ballast tanks and a pumping device in order to prevent fluctuation due to the load of LNG or the state of the sea. Such a ballast tank May be integrated with the LNG tank 120 or independent.

  The LNG tank 120 is provided inside the floating structure 110 so as to store LNG, and is configured with a membrane type or type B or type C independent type cargo hold form prescribed by the International Maritime Organization (IMO). obtain. In addition, the LNG tank 120 can be configured with a 1-row or 2-row structure, and in addition to the LNG pump 140, a delivery pump, strip pump, Inner and outer pressure control safety valves, temperature and pressure sensing devices, gas sensing devices and the like may be provided.

  The LNG line 130 is provided so as to provide a path for transferring LNG from the LNG tank 120 or a path for receiving LNG replenishment from the LNG supply ship 20, and has a material and a structure capable of withstanding the extremely low temperature of LNG. .

  The LNG pump 140 is provided to provide a pumping force for delivering LNG to the LNG line 130, and a cryogenic pump for pumping LNG that is at a cryogenic temperature may be used.

  The compressor 150 is provided on the LNG line 130 and can compress the LNG supplied to the tank 11 of the filling target 10 that needs to be filled with LNG with a necessary pressure.

  The cargo handling unit 160 can supply the LNG transferred from the LNG line 130 to the tank 11 of the filling target 10 via the filling line 161. As shown in FIG. 3, the filling line 161 can be switched so that the LNG tank 120 is filled with LNG via the LNG line 130 in order to receive LNG replenishment from the LNG supply ship 20, as shown in FIG. This may allow LNG transport. For this purpose, the filling line 161 may be configured to include a flexible hose.

  The cargo handling unit 160 includes a loading arm for connecting the filling line 161 to the tank 11 of the filling target 10 that requires LNG filling, and a LNG in a central control room (for example, CACC, Centralized Administration Control Center). Or an integrated automated system (eg, IAS, Integrated Automation System), etc. so that it can operate overall operations related to the transfer of BOG (Boil Of Gas), reliable flow control, temperature control, pressure control It can be performed.

  Meanwhile, the LNG line 130 may be provided with a first bypass line 131 for bypassing the compressor 150 when receiving LNG replenishment from the LNG supply ship 20, and bypassing the LNG pump 140. A second bypass line 132 for supplying LNG to the LNG tank 120 may be installed. At this time, one or more valves are installed in one or both of the LNG line 130, the first and second bypass lines 131 and 132, and the LNG supplied to the LNG tank 120 is compressed. 150 and LNG pump 140 may be bypassed.

  In addition, the cargo handling unit 160 not only transfers evaporative gas to the filling object 10 or the LNG supply ship 20 located in parallel with the floating structure 110, but also evaporates to the filling object 10 or the LNG supply ship 20 located in series. It can be configured to be able to transport gas.

  The cargo handling unit 160 transfers evaporative gas, for example, evaporative gas generated in the LNG tank 120 to the LNG supply ship 20, or evaporative gas generated in the tank 11 of the filling object 10 to the LNG tank 120. The evaporative gas line 162 may be further included. Such an evaporative gas line 162 transfers the evaporative gas generated in the tank 11 of the filling target 10 to the LNG tank 120 when the LNG is supplied from the LNG tank 120 to the filling target 10, thereby generating the evaporative gas. The function of compensating for the pressure increase in the ten tanks 11 can be achieved.

  Specifically, the evaporative gas line 162 can fulfill the function of compensating the pressure between the LNG tank 120 and the tank 11 of the filling target 10. That is, the tank 11 of the filling target 10 that receives the supply of LNG from the LNG tank 120 is filled with a substantial portion of the initial vaporized gas, and when the LNG is supplied from the LNG tank 120 to the tank 11 of the filling target 10, the tank 11 It is necessary to appropriately transfer the evaporative gas in the LNG tank 120.

  If the evaporative gas cannot be discharged from the tank 11 of the filling target 10, the pressure in the tank 11 of the filling target 10 having a predetermined volume rises rapidly, so that not only the stability of the tank 11 but also the LNG Problems also arise in transport. Therefore, by transferring the evaporation gas from the tank 11 of the filling object 10 to the LNG tank 120 via the evaporation gas line 162, the pressure due to the evaporation gas can be compensated.

  The evaporative gas line 162 can also perform the function of compensating the mutual volume between the LNG tank 120 and the tank 11 of the filling object 10. That is, by transferring an evaporating gas having the same volume as the LNG supplied from the LNG tank 120 to the tank 11 of the filling object 10 from the tank 11 of the filling object 10 to the LNG tank 120, the LNG tank 120 and the tank of the filling object 10 are transferred. 11 can also function to compensate the volume, that is, to exchange the volume with each other. Such an evaporative gas line 162 may be configured to include a flexible tube.

  Here, the vaporized gas to be transferred can be used as a separate fuel. For this purpose, the cargo handling unit 160 further includes a supply line 163 that is branched from the evaporative gas line 162 so that the evaporative gas can be supplied to the evaporative gas processing device 113 that uses evaporative gas as fuel. Accordingly, the evaporative gas transferred along the evaporative gas line 162 can be supplied to the evaporative gas processing device 113 via the supply line 163. Further, a switching valve 164 for bypassing the evaporative gas processing device 113 may be installed in any one or both of the evaporative gas line 162 and the supply line 163. Here, the switching valve 164 can be composed of a number of bidirectional valves as well as a three-way valve as in the present embodiment.

  The evaporative gas processing device 113 can be, for example, any one or more of a boiler, an incinerator, a power plant or generator for power generation, and a fuel engine. A specific use example of the evaporative gas processing apparatus 113 will be described with reference to FIGS. 5 and 6.

  The cargo handling unit 160 may further include a metering unit 165 for measuring the amount of LNG transferred. Therefore, the amount of LNG transferred from the LNG tank 120 and the amount of LNG filled in the LNG tank 120 can be easily understood from the outside.

  FIG. 4 is a block diagram illustrating a floating LNG filling station according to a second embodiment of the present invention.

  As shown in FIG. 4, the floating LNG filling station 200 according to the second embodiment includes a floating structure 210, an LNG tank 220 for storing LNG provided in the floating structure 210, and an LNG tank 220. LNG line 230 for transferring LNG from the LNG, LNG pump 240 provided to provide LNG line 230 with a pumping force for delivering LNG, and LNG for compressing LNG provided in LNG line 230 Compressors 251 and 252 and a cargo handling unit 260 for supplying LNG transferred from the LNG line 230 to a ship or offshore structure may be included. Since these configurations are substantially the same as the corresponding configurations of the floating LNG filling station 100 according to the first embodiment, description thereof will be omitted.

  In the present embodiment, the compressors 251 and 252 are each composed of a multi-stage or multi-stage compressor having different LNG compression pressures, and can be selectively used depending on the delivery pressure of the LNG. As an example, as in the present embodiment, a high-pressure compressor 251 for compressing LNG at high pressure and a medium-low pressure compressor 252 for compressing LNG at medium or low pressure can be included.

  The high-pressure compressor 251 and the medium- and low-pressure compressor 252 are used for filling objects 10 such as marine structures that have ships that use LNG as a fuel for propulsion and power generation, and facilities that are driven using LNG as a fuel. The LNG compression pressure is selected according to the pressure condition required when filling the LNG, that is, the compression filling condition, so that the compression pressure of the LNG can be determined within an appropriate range. If the LNG can be supplied only by the delivery pressure, it may not be used, and since it is configured in two stages as in this embodiment, it is not only composed of two, but if necessary, 3 The number of compressors may be arranged in parallel.

  In addition, each of the compressors 251 and 252 can be manufactured in a multistage structure in which modular compressors are arranged in series and used in the present embodiment.

  Each of the compressors 251 and 252 is manufactured so that the LNG can be compressed and supplied on the LNG line 230 so as to correspond to the compression and filling conditions to be filled at low pressure, sometimes at medium pressure or high pressure. Can be installed.

  FIG. 5 is a configuration diagram showing a process for processing evaporative gas generated when LNG is supplied from the floating LNG filling station to the filling target. FIG. 6 is a diagram illustrating how LNG is supplied from the LNG supply ship to the LNG filling station. It is a block diagram which shows the process for processing the evaporative gas generated when supplying.

  Referring to FIGS. 5 and 6, any evaporative gas generated during the transfer of LNG between the floating LNG filling station and the filling target or LNG supply ship is operated in the facility that requires electric power at the floating LNG filling station. And can be used to generate the necessary power for operation of the required utility 300.

  For example, the utility 300 may correspond to compression devices, pumps, lights, air conditioning equipment, control equipment, or various power consuming devices that can be used in the floating LNG filling station, and may not be limited thereto. .

  As shown in FIG. 5, when the LNG is filled into the filling object, or when receiving LNG replenishment from the LNG replenishment ship 20, as shown in FIG. Via the gas processing line 22a, a gas compressor 90 that can be compressed at a required pressure is passed.

  Here, the evaporative gas processing line 22a processes the evaporative gas and uses it as fuel, and utilizes this for generation of power and generation of electric power so as to supply electric power necessary for utilities that require electric power. The evaporative gas can be supplied from the LNG tank 120 to the gas compressor 90 or the power generation device 80a. Here, the power generation device 80a may be a diesel engine, a dual fuel diesel engine, a gas turbine device, a steam boiler, a steam turbine device, or the like. Further, a storage container 91 is connected to the rear stage of the gas compressor 90, so that the compressed evaporative gas can be temporarily stored, and a function as a buffer when supplying the evaporative gas can be performed. Yes. Here, the storage container 91 may have various forms such as a pressure container and a buffer tank.

  A control valve 92 may be coupled to an extension line connected from the rear stage of the storage container 91 to the power generation device 80a so that the supply flow rate of the evaporative gas in the storage container 91 can be adjusted.

  Therefore, the evaporative gas that has passed through the gas compressor 90 can be temporarily stored in a separate storage container 91 and then sent to the power generation device 80a for combustion, or the gas compressor 90 or the storage container 91 can be Without going through, it can be sent directly from the LNG tank 120 to the power generation device 80a and burned.

  Here, a generator 80b that generates electric power using the power generated by the power generation device 80a may be coupled to the output end of the power generation device 80a. Further, a voltage control device 80c (for example, a switch board) that converts and supplies generated power to utility use power and manages it can be electrically connected to the output end of the generator 80b.

  Thereby, electric power can be generated using the generator 80b by the power generated by the power generation device 80a, and the generated power is transmitted to each utility 300 that needs power through the voltage control device 80c. Can be supplied.

  Apart from this, regardless of the transfer of LNG between the floating LNG filling station and the filling object 10 or the LNG supply ship 20, it is naturally generated in the LNG hold 120 by heat input from outside. The evaporating gas may also be supplied and processed for fuel through the evaporating gas processing line 22a and associated coupling arrangement. Referring to FIG. 6, similarly, when the LNG tank 120 is supplied with the LNG from the LNG supply ship 20, the LNG in the LNG tank 120 is similarly transferred to the LNG via the evaporative gas line 162 and the cargo handling unit 160. This can be transferred to the supply ship 20 and this is the same as the case where LNG is transferred from the LNG tank 120 to the tank 11 of the filling object 10, and a specific description thereof will be omitted.

  The operation of the floating LNG filling station according to the present invention having such a configuration will be described as an example as follows.

  As shown in FIG. 2 and FIG. 4, a ship that needs to be filled with a filling object 10, for example, LNG, berthed on a floating structure 110, 210 that is fixed in a floating state on the sea by a self-tethering device 111. In addition, the filling lines 161 and 261 are connected to the tank 11 provided in the offshore structure by the cargo handling units 160 and 260. Thereafter, the LNG in the LNG tank 110 is supplied to the tank 11 of the filling object 10 through the LNG lines 130 and 230 and the filling lines 161 and 261 by pumping the LNG pumps 140 and 240.

  At this time, if necessary, the LNG is compressed by an appropriate pressure by the compressor 150 shown in FIG. 2 so as to be filled, or according to the degree of compression or the compression filling condition, as shown in FIGS. Filling may be accomplished by the illustrated multiple or multistage compressors 251, 252.

  As shown in FIGS. 3 and 6, when it is necessary to replenish the LNG tank 120 of the floating structure 110, the cargo handling unit 160 is used and the manifold 22, the filling line 161 and the LNG of the LNG replenishment ship 20 are used. LNG is provided from the LNG tank 21 of the LNG supply ship 20 to the LNG tank 120 of the floating structure 110 via the line 130.

  At this time, as shown in FIG. 3, the LNG supplied to the LNG tank 120 of the floating structure 110 bypasses the compressor 150 and the LNG pump 140 via the first and second bypass lines 131 and 132. You can also.

  On the other hand, the cargo handling unit 160 transfers the evaporative gas generated in the tank 11 of the filling object 10 to the LNG tank 120 of the floating structure 110 through the evaporative gas line 162 when supplying LNG as described above, or The evaporated gas generated in the LNG tank 120 of the floating structure 110 can be transferred to the LNG tank 21 of the LNG supply ship 20.

  Thereby, the evaporative gas line 162 can perform a function of compensating the pressure between the LNG tank 120 and the tank 11 of the filling target 10, and the evaporating gas line 162 is connected to the tank 11 of the LNG tank 120 and the filling target 10. It is also possible to compensate for each other's volume.

  In other words, the tank 11 of the filling target 10 that receives the supply of LNG from the LNG tank 120 is filled with a substantial portion of the initial evaporated gas, but when the LNG is supplied from the LNG tank 120 to the tank 11 of the filling target 10, By appropriately transferring the same amount of evaporating gas as the amount of LNG supplied to the LNG tank 120, it is possible to compensate each other's pressure and volume.

  In this process, the evaporative gas in the evaporative gas line 162 is supplied to the evaporative gas processing device 113 of the floating structure by switching the switching valve 164 and used as a fuel for generating electric power as described in FIG. 5 or FIG. It can be so.

  As described above, the specific embodiments have been described in the detailed description of the present invention. However, it is obvious that the technology of the present invention can be easily modified by those skilled in the art. It can be said that the form is included in the technical idea described in the claims of the present invention.

Claims (14)

A filling station that floats on the sea and can fill a filling object that requires LNG with LNG,
Floating structures,
An LNG tank for storing LNG, provided in the floating structure;
An LNG line for transferring LNG from the LNG tank to the filling object;
A floating LNG filling station comprising: an LNG pump for providing the LNG line with a pumping force for delivering LNG;   It further includes a multi-stage compressor provided on the LNG line and capable of compressing and supplying LNG at any one of a low pressure, an intermediate pressure, and a high pressure according to the compression filling condition of the filling target. The floating LNG filling station according to claim 1.   A cargo handling unit capable of supplying the LNG transferred from the LNG line to the object to be filled, and capable of transferring evaporative gas generated in the object to be charged to the floating LNG filling station when the LNG is supplied; The floating LNG filling station according to claim 1.   The floating LNG according to claim 1, further comprising an evaporative gas processing facility for temporarily storing evaporative gas generated when the LNG is supplied and / or using the evaporative gas as fuel for power generation. Filling station.   The floating LNG filling station according to claim 1, wherein the floating structure includes one or more of an automatic positioning device or a self-tethering device by satellite navigation.   The floating type LNG filling station according to claim 1, wherein the floating type structure includes a water treatment device for preventing shaking depending on a load amount of LNG or a state on the sea.   4. The floating LNG filling station according to claim 3, wherein the cargo handling unit can supply LNG to the LNG tank from an LNG supply ship via the LNG line.   The floating LNG filling station according to claim 7, wherein the LNG line is provided with a first bypass line for bypassing the compressor.   The floating LNG filling station according to claim 7 or 8, wherein a second bypass line is provided in the LNG line to bypass the LNG pump and supply LNG to the LNG tank.   The floating LNG filling station according to claim 3 or 7, wherein the cargo handling unit further includes an evaporative gas line for transferring evaporative gas. The cargo handling unit is
An evaporative gas treatment apparatus provided in the floating structure and capable of using the evaporative gas as fuel;
The floating LNG filling station according to claim 10, further comprising: a supply line branched from the evaporative gas line so as to supply evaporative gas to the evaporative gas processing apparatus.   The floating LNG filling station according to claim 3 or 7, wherein the cargo handling unit has a measuring device for measuring the amount of LNG transferred. The evaporative gas treatment facility is
An evaporative gas treatment line for taking out the evaporative gas excessively generated in the LNG tank from the LNG tank;
A gas compressor for pressurizing the evaporative gas supplied from the evaporative gas processing line;
A storage container for temporarily storing the compressed evaporative gas compressed by the gas compressor;
A power generation device that generates power using the compressed evaporative gas supplied from the storage container;
An extension line connecting the storage container and the power generator to each other;
The floating LNG filling station according to claim 4, further comprising: a control valve provided on the extension line for adjusting the supply amount of the compressed evaporative gas. The evaporative gas treatment facility is
A generator that generates electric power using the power generated by the power generation device;
The floating LNG filling station according to claim 13, further comprising: a voltage control device provided on a power supply line between the output end of the generator and various power consuming devices.

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